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ssl232 commented on LIGO detects most massive black hole merger to date   caltech.edu/about/news/li... · Posted by u/Eduard
andrepd · 2 months ago
Yes! And still, gravity is so weak that that immense amount of energy translates to just a relative contraction of less than 10^-20, or about a hair's width in the distance from the Earth to the Moon.
ssl232 · 2 months ago
This is because space is _stiff_. Recall Hooke’s law from high school physics. The k constant represents the stiffness of the object. A rubber band is about 50. A sky scraper, about a million. Space? About 10^46 if I recall correctly. So it takes a truly enormous amount of energy in the form of gravitational waves to be able to move space enough for it to be detectable on Earth. And the only objects that can do that are the most massive ones moving at close to the speed of light: black holes, neutron stars, supernovae (the latter would have to be very close for us to see gravitational waves from - close enough that we’d likely see it with the naked eye as well).
ssl232 commented on Preliminary report into Air India crash released   bbc.co.uk/news/live/cx20p... · Posted by u/cjr
bgwalter · 2 months ago
Does the Flight Data Recorder consider the physical position of the fuel switches or does it get the information from some fly-by-wire part that could be buggy?

The conversation would suggest that the switches were in CUTOFF position, but there is also a display that summarizes the engine status.

There is no conversation that mentions flipping the switch to RUN again.

EDIT: Why is there no Cockpit Video Recorder? The days of limited storage are over.

ssl232 · 2 months ago
> EDIT: Why is there no Cockpit Video Recorder? The days of limited storage are over.

Pilots unions are dead against it.

ssl232 commented on Show HN: Interactive pinout for the Raspberry Pi Pico 2   pico2.pinout.xyz... · Posted by u/gadgetoid
ssl232 · 2 months ago
Thank you. I found this years ago and look it up every time I’m working on a Raspberry Pi project. Keep up the good work!
ssl232 commented on $100 Hamburger   en.wikipedia.org/wiki/$10... · Posted by u/TMWNN
ssl232 · 3 months ago
I guess landing fees add to the $100?
ssl232 commented on Show HN: Chili3d – A open-source, browser-based 3D CAD application    · Posted by u/xiange
immmmmm · 3 months ago
I’m doing a bit of BREP for GIS and even in 2D with line segments only the problem is really non-trivial, a lot of edge (pun intended) cases to take care of. Type system helps enormously, so probably rust will be a win here (I think I saw a project along those lines).

That being said, for CAD (personal usage) I switched from Fusion 360 to Freecad 1.0 with almost no project and the latter is an order of magnitude faster.

ssl232 · 3 months ago
Agreed, FreeCAD 1.0 is finally almost usable and supports assemblies. My main issue with it is that the bill of materials tool was DOA but it’s fixed in the main branch. There are still lots of quirks but these can be learned in a few hours of using it.
ssl232 commented on Apple introduces a universal design across platforms   apple.com/newsroom/2025/0... · Posted by u/meetpateltech
cyberax · 3 months ago
Try getting a device like a foldable phone that has no i-land analogs! That will provide a nice way to get benefits from the transition.
ssl232 · 3 months ago
Wasn’t there a rumour that the next iPhone will be foldable?
ssl232 commented on Why we still can't stop plagiarism in undergraduate computer science (2018)   kevinchen.co/blog/cant-st... · Posted by u/wonger_
bradley13 · 3 months ago
I'm a prof. The easy solution is to give very little weight to homework. The assignments should be designed to teach concepts. Concepts that are then tested in a controlled environment, where cheating is not possible.

Remove the incentive to cheat, and save yourself the time trying to catch it (and punish it, despite an uncooperative administration).

ssl232 · 3 months ago
Agreed. Generations of students had their degree classifications determined by a small number of final exams under exam conditions. Why did we move away from that, opening up all of these routes to score degree grading in non exam conditions?
ssl232 commented on Why are banks still getting authentication so wrong?   jamal.haba.sh/its-2025-wh... · Posted by u/kamikazee
TuxPowered · 4 months ago
Is this another incarnation of Sofort? Fortunately nobody is forced to used the former nor the later, you can either pay with card or just make your own SEPA transfer from any bank in Europe.
ssl232 · 4 months ago
Ah yes it was Sofort, not Klarna.
ssl232 commented on Why are banks still getting authentication so wrong?   jamal.haba.sh/its-2025-wh... · Posted by u/kamikazee
wodenokoto · 4 months ago
When calling my bank I have to enter my entire CC number AND my PIN code.

Talk about training people to give away sensitive data.

ssl232 · 4 months ago
In Germany, paying for goods online using Sofort (direct bank payment, not buy now pay later) literally involves typing in the same credentials used to log into online banking, that’s your account number, branch and PIN, followed by scanning a “TAN” similar to a QR code using the bank app. The only thing stopping them taking my data and logging into my banking it seems is the TAN app part, that could easily be phished.

Edit: changed Klarna to Sofort

u/ssl232

KarmaCake day3741March 5, 2016View Original